Vania



May 29,- 1928. 1,671,936

0. P. RIEGER STETHOSCOPE Filed Jan. 29, 1927 WITNESSES I N VEN TOR:

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BY $7M @7 2 A TTORNEYS.

Patented May 29, 1928.

UNITED STATES PATENT OFFICE.

OTTO P. RIEGER, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE GEORGE P. PILEING &

SON COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN SYL- VANIA.

STETHOSGOPE.

Application filed January 29, 1927. Serial No. 164,586.

This invention relates to stethoscopes more particularly useful in making cardiac examinations and it has for an object the provision of a device whereby such examinations are made easier and more rapid.

The invention consists essentially of the combination in a stethoscope of a bell and a diaphragm device with a common control whereby selective use of either device'is effected without dismantling any part or parts; or the removal of theaurals from the ears;

The accompanying drawings typically illustrate my invention. I

Fig. I is a longitudinal sectional view of a stethoscope embodying my improvements; and, i

Fig. II is an elevational view looking to the left of Fig. I.

Referring more in detail to the drawings niysnovel stethoscope comprises a Valve casing 3, having an integral concavo-convex portion 4 providing the diaphragm chamber 5, which is closed by a flexible diaphragm 6 held in place by-the screwed collar 7. At right angles to the portion 4 the casing 3 is counter-bored at 8 to receive the shouldered applicator tip orsound receiving hell 9.

lVithin the body casing 3 is mounted a rotary plug valve 10 of the three-way type having connecting ports 11, 12 and 13 adapted to, respectively establish communication from the bell 9 or diaphragm chamber 5 with the usual fork 14, to which the aural tubes 15 are conventionally attached. The plug valve 10 is shifted by means of a yoke lever 16, and it will be seen that by working said lever in the direction of the arrow on Fig.1, communication from the bell 9 to the aural tubes '15 will be cut o'li', and that to the diaphragm chamber 5 opened.

From the foregoing it will be clear that connection 14 which they hold in the gen erality of known stethoscopes. In other words the hell 9 is in direct axial alignment with the fork lat and the diaphragm 6 at right angles thereto.

Having thus described my invention, I

claim 1. The combination, in a stethoscope, of a diaphragm chamber and a bell sound receiving member at substantially right angles thereto with a common control operative to open or close communication from either device relative tothe binaurals.

2. In a stethoscope, the combination of a valve casing having an integral diaphragm chamber and an attached bell sound receiving member at substantially right angles thereto, and a three-way plug valve in said casing controlling sound transmission from either the diaphragm chamber or the bell member to the binaurals.

3. Al stethoscope embodying a vibratory and a non-vibratory sound receiving means at substantially right angles to one another and under control of a three-way valve whereby either of said means are individual ly usable.

In testimony whereof, I have hereunto signed my name at St. Petersburg, Fla, this 26th day of January, 1927.

OTTQ P. RIEGER. 

